Sofa



FIG. 1 is a front elevational view of a sofa showing our new design;

FIG. 2 is a rear elevational view thereof;

FIG. 3 is a right elevational view thereof;

FIG. 4 is a left elevational view thereof;

FIG. 5 is a top plan view thereof;

FIG. 6 is a bottom plan view thereof;

FIG. 7 is a right front perspective view thereof;

FIG. 8 is a left front perspective view thereof;

FIG. 9 is a right front perspective view, shown in a reclined positionthereof; and,

FIG. 10 is a left front perspective view, shown in the reclined positionthereof.

The elements shown in broken lines are for illustrative purposes onlyand form no part of the claimed design.

CLAIM The ornamental design for a sofa, as shown and described.